Hair dryer



FIG. 1 is a side view showing my new design for a hair dryer, the opposite side being a mirror image thereof;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof. 

The ornamental design for a hair dryer, as shown and described. 